使用 choose 标签
<choose>
<when test="isReSend">
and (info.batchId is not null)
</when>
<otherwise>
and (info.batchId = '' or info.batchId is null)
</otherwise>
</choose>或者
<choose>
<when test="isReSend==true">
and (info.batchId is not null)
</when>
<otherwise>
and (info.batchId = '' or info.batchId is null)
</otherwise>
</choose>留言